2-channel voltage supervisor in SC-70-4
The MAX6389XS33D1 is a multi-voltage supervisor from Analog Devices that monitors two independent supply rails — one fixed at 3.3 V and one adjustable via external resistors — and asserts an active-low, open-drain reset when either falls below its threshold. The reset output remains low for a minimum of 1 ms after all monitored voltages return above threshold, providing a clean power-on reset signal for microcontrollers, DSPs, or FPGAs that need a guaranteed hold time before the core starts executing code.
Housed in a 4-lead SC-70 (SOT-343) package, the footprint matches the standard SC-70-4 land pattern — the same pad geometry used by many single- and dual-voltage supervisors, so a board spin is not required when swapping between similar parts from the same family.